Let-off motion for looms.



H. HE-RZBERG. LET-OFF MOTION FOR LOOMS.

APPLIOATION FILED MAY 1, 1907.

Patented JanQ12, 1909.

' INVENTOH zfsvzrz zrzery By M o ATTORNEYS WITNESSES THE Noam: FII'ER:co.. waswucToN.

HENRY HERZBERG, OF NEW YORK, N. Y.

LET-OFF MOTION FOR- LOOMS.

Specificationof Letters Patent.

Patented Jan. 12, 1909.

Application filed May 1, 1907. Serial No. 371,211.

To all whom it may concern:

Be it known that I, HENRY HERZBERG, a citizen of the United States, anda resident of the city of New York, Astoria, borough of Queens, in thecounty of Queens and State of New York, have invented a new and usefulImprovement in Let-Off Motions for Looms, of which the following is afull, clear, and exact description.

The purpose of the invention is to provide a simple, effective anddurable tension device readily applicable to the head of the warp beamof any loom, and which can be quickly and conveniently set to regulatethe rapidity at which the warp thread shall leave the warp beam.

The invention consists in the novel construction and combination of theseveral parts, as will be hereinafter fully set forth and pointed out inthe claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the fi ures.

Figure 1 is a side elevation of a portion of the frame of a loom,showing the head of the warp beam in section and the let-ofl or tensiondevice in side elevation, the section being taken practically on theline 11 of Fig. 3; Fig. 2 is an enlarged vertical section through thelet-off attachment taken practically on the line 22 of Fig. 1; and Fig.3 is a horizontal section through a portion of the frame, and a planview of the end portion of the warp beam and its head, also a plan viewof the applied let-ofi' mechanism.

A represents a side piece of the frame of a loom, B the warp beamprovided with the customary head B the trunnions 10 of the warp beambeing mounted in suitable bearings 11 carried by the side pieces A ofthe frame, and above the warp beam B a guide roller 12 is mounted insuitable bearings 13 also carried by the side pieces of the frame, andthe roller 12 receives the warp thread 14: as it leaves the warp beam B.

The body of the attachment consists of opposing segmental sections 15and 15 the concaved surfaces of the said sections 15 and 15 being madeto face each other, as is best shown in Fig. 1. The section 15 isprovided with a knuckle 16 at its inner end and the section 15 isprovided with a corresponding knuckle 17 also at its inner end, and apintle 18 is passed through the knuckles l6 and 17 so as to provide ahinge connection between the two body sections 15 and 15 The uppersection of the body is held stationary and this is accomplished bylocating a lip 19 at the inner side portion of the knuckle 17, as isshown in Figs. 1 and 3, which lip may be attached to or may be lntegralwith the said knuckle l7, and is carried inward in direction of the sidepiece A of the frame and is made to enter a suit able recess 20 in thesaid side piece, as is also shown in Figs. 1 and 3.

At the inner faces of the body sections 15 and 15 segmental shoes 21 arelocated, and these shoes are adapted to engage directly wlth the head Bof the warp beam, and the shoes 21 may be made of leather or othersimilar material, so as to obtain the greatest possible frictionalengagement between the sections 15 and 15 of the body of the attachmentand the head B of the warp beam, as is shown in Fig. 1.

The upper body section 15 is provided with a horizontal outwardlyextending flange 22 at its outer end, and the lower body section 15 isprovided with a corresponding flange 22*, the two flanges 22 and 22being one below the other in parallelism, as is also best shown in Fig.1 and likewise in Fig. 2. Each flange 22 and 22 is provided with anaperture 23 therein adj acent to its outer end, and the apertures 23 ofthe two flanges are in vertical alinement.

A bolt 24 is loosely passed through the aperture 23 of the body flanges22 and 22 The upper portion of the bolt 24 is threaded and on thethreaded portion 25 of the bolt, a thumb nut 26 is screwed to a bearingupon the upper face of the upper body flange 22, as is particularlyshown in Fig. 2, and between the two flanges 22 and 22' a spring 27 at apoint adjacent to where said flange con nects with the body section 15*,as is shown in Fig. 1. The scale beam 28 is provided with an upwardlyextending stop 30 at its outer or free end, and between the said stopand the pivot of the said scale beam 28, a

series of notches 31 is formed. On the upper edge of the said scale beama pendant 32 having a crooked upper end' 32 is supported by engagementat said crooked end with'the upper edge of the scale beam 28, and theupper crooked end 32 of the pendant 32 is provided with an under, moreor less angular edge to fit in the notches 31, and the said pendant 32carries any desired number of removable weights 33.

'In the operation of this attachment, the body sections 15 and 15 aremade toengage with the head B of'the warp beam, and the lip 19 of theupper section 15 having been introduce into the recess or pocket 20 inthe frame, the bolt24: is tightened or loosened by means of the, thumbnut 26, to exert greater or less tension upon the spring 27 interveningbetween the flanges 22 and 22,

V and at this time the pendant 32 will be placed as close to the pivotof the scale beam 28 as possible or desirable, and in this man ner thenormal degree of tensional bearing of the body sections 15 and 15 on thehead of the warp beam is regulated. \Vhen the tension is to be increasedso as to lessen the speed at which the warp thread will leave the warpbeam, the pendant 32 is carried outward to, for example, the first notch31 and one or more weights 33 are placed in position on the pendant asmay be required. After the weights have served their purpose at thefirst notch 31, and a greater degree of tension is required so as tomake the warp thread leave the warp beam still slower, the pendant 32with one or more weights applied is moved to the second outer notch 31and so on; according to the extent to which the pendant 32 is movedoutward on the scale beam will be the severity of the tensional contactbetween the body of the attachment and the head of the warp beam. Itwill be observed that the weight on the lever 28, assisted by the bolt24 and the nut 26, applies the tension flanges 22, 22 to the beam, thespring 27 acting as a cushion be tween the flanges, and when the weighton the lever is shifted inward, the spring automatically forces theflanges apart. Thus it will be observed that the speed at which the warpthread shall leave the warp beam can be quickly and convenientlydetermined and change'd'at pleasure, and that the device through themedium of which the tension is applied to the warp beam is exceedinglysimple and is applicable to a warp beam of any loom. 2

Having thus described my invention, I claim asnew and desire to secureby Letters .Patent,

1. In a let-off motion for looms, a body section comprising opposingsegmental sec; tions havinga hinged connection, means for limiting themovement offone of the sections,

means acting between the free ends of the 7 sections to normally forcethem apart, and,

a counter-balancing device acting against said means.

2. In a let-off motion for looms, a body section comprising opposingsegmental sections having a hinged connection, means for limiting themovement of one of the sections, means acting between thefree ends ofthe sections for moving them apart, a coun ter-balancing device actmgtomove the sections toward each other, said device comprising a beamhaving pivotal connection with the first section and bearing 'againstthe other section.

' 3.111 a let-off motion for looms, opposin I (1' segmental bodysections having a hinged.

connection, means for limiting the movement of one of the sections, theother being free for movement to and from the first named sections, aspring interveningthe two body sections at their free ends, a regulatingdevice for the said spring, a beamp votally attached to the saidregulating device, and having bearing upon the moving body section toassist in holding said section in regulated position.

4. In a let-off motion for looms, a body section consisting of opposingsegmental:

members having a hinged connection at one of their ends, means forlimiting the movement of the uppermost member, a spring,

.110 said members, means for compressing or permitting said spring toexpand, a weight operated lever carried by said compressing means andexerting pressure in direction of.

located between the free end portions, of

the uppermost member of the body.

5. In a let ofl motion for looms, the comv bination with a body portionconsisting of opposing segmental sections having a hinged connection atone end, and parallel,

flanges at their opposing ends, means for; limiting the movement of oneof the body, sections, a spring intervening the flanges of the bodysections, and a bolt and a nut for regulating the said spring, of a beampivot:

ally connected with the said bolt, adjacent to the under portionoftheflange of the movable body section, the said beam being Intestimony vvhereof I have signed my provided With an upwardly extendingheel name to this speclfication in the presence of portion adjacent toits pivot for engagement two subscribing Witnesses.

with the under face of the saidflange of the HENRY HERZBERG. I saidmovable section of the body, and a Witnesses: Weight carrying pendantsupported by and C. MATTMANN, Jr.,

movable upon the said beam. HENRY S. STARR.

